Method loadExistingDepthValues

gapis/api/vulkan/overdraw.go:1808–1854

If the depth attachment is in "load" mode we need to copy the depth values over to the depth aspect of our new depth/stencil buffer.

(ctx context.Context,
	cb CommandBuilder,
	gs *api.GlobalState,
	st *State,
	a arena.Arena,
	device VkDevice,
	queue VkQueue,
	cmdBuffer VkCommandBuffer,
	renderInfo renderInfo,
	alloc func(v ...interface{}) api.AllocResult,
	addCleanup func(func()),
	out transform.Writer,
)

// If the depth attachment is in "load" mode we need to copy the depth values
// over to the depth aspect of our new depth/stencil buffer.
func (s *stencilOverdraw) loadExistingDepthValues(ctx context.Context,
	cb CommandBuilder,
	gs *api.GlobalState,
	st *State,
	a arena.Arena,
	device VkDevice,
	queue VkQueue,
	cmdBuffer VkCommandBuffer,
	renderInfo renderInfo,
	alloc func(v ...interface{}) api.AllocResult,
	addCleanup func(func()),
	out transform.Writer,
) error {
	if renderInfo.depthIdx == ^uint32(0) {
		return nil
	}
	rpInfo := st.RenderPasses().Get(renderInfo.renderPass)
	daInfo := rpInfo.AttachmentDescriptions().Get(renderInfo.depthIdx)

	if daInfo.LoadOp() != VkAttachmentLoadOp_VK_ATTACHMENT_LOAD_OP_LOAD {
		return nil
	}

	fbInfo := st.Framebuffers().Get(renderInfo.framebuffer)

	oldImageView := fbInfo.ImageAttachments().Get(renderInfo.depthIdx)
	newImageView := fbInfo.ImageAttachments().Get(uint32(fbInfo.ImageAttachments().Len() - 1))

	oldImageDesc := imageDesc{
		oldImageView.Image(),
		oldImageView.SubresourceRange(),
		daInfo.InitialLayout(),
		VkImageAspectFlagBits_VK_IMAGE_ASPECT_DEPTH_BIT,
	}
	newImageDesc := imageDesc{
		newImageView.Image(),
		newImageView.SubresourceRange(),
		VkImageLayout_VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
		VkImageAspectFlagBits_VK_IMAGE_ASPECT_DEPTH_BIT,
	}

	return s.transferDepthValues(ctx, cb, gs, st, a,
		device, queue, cmdBuffer,
		fbInfo.Width(), fbInfo.Height(),
		oldImageDesc, newImageDesc,
		alloc, addCleanup, out)
}

// If the depth attachment is in "store" mode we need to copy the depth values
// over from the depth aspect of our new depth/stencil buffer.